Tuan Nguyen Van, Tuan Anh Nguyen, Quy Le Thu and Ha Pham Thi
In this work, Cr3C2-25NiCr coatings were deposited on 410 stainless steel substrate by using the atmospheric plasma spray technique, at varying spaying parameters. The porosity…
Abstract
Purpose
In this work, Cr3C2-25NiCr coatings were deposited on 410 stainless steel substrate by using the atmospheric plasma spray technique, at varying spaying parameters. The porosity and microhardness, adhesion strength and corrosion behaviour of coatings were examined in relation to these spraying parameters.
Design/methodology/approach
The microstructure of prepared coatings was examined by using scanning electron microscopy. The coating compositional analysis was performed by using X-ray diffraction (XRD) technique. The corrosion resistance of coated steel was investigated by potentiodynamic polarization. Results indicate that optimal factors for minimalizing the porosity were as follows: 10 g/min feed rate, 600 A plasma current and 100 mm spraying distance. The spraying factors influencing corrosion resistance of coating were also evaluated.
Findings
Under this optimal condition, the porosity of coating reached its minimal value of 3.1 per cent. The microhardness and adhesion of coatings also reached their maximum values of 64.8 Rockwell Hardness scale C and 60 MPa, respectively. XRD results indicated the transformation of Cr3C2 originating from Cr3C2-25NiCr source powder into Cr7C3 and Cr23C6 crystalline phases, due to the high temperature during spraying process. The undetectable Cr3C2 peaks indicating that this phase was remained in coating at very low concentrations. The potentiodynamic polarization and salt spray tests confirmed the highest corrosion resistance for the coating prepared by optimal spraying parameters.
Originality/value
The application of Cr3C2-NiCr cermet carbit coating for protection of steel from corrosion-erosion is very promising.
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Tuan Van Nguyen and Nguyen-Hau Le
For developing and testing service-dominant logic (SDL)-based midrange theories of marketing, the operationalization of SDL into the managerial concept of service-dominant…
Abstract
Purpose
For developing and testing service-dominant logic (SDL)-based midrange theories of marketing, the operationalization of SDL into the managerial concept of service-dominant orientation (SDO) and its measures is imperative. However, existing scales found in the literature are insufficient and incomplete. This study aims to develop and validate an alternative firm-based scale for measuring SDO.
Design/methodology/approach
The established procedure for scale development was adopted which comprised three phases. First, a mix of qualitative study and literature deduction was applied to conceptualize and define SDO. Second, based on quantitative data (Study 1, N= 228 cases), scale development and refinement were undertaken. Finally, another data set (Study 2, N = 379 cases) was used to validate the scale.
Findings
SDO is defined as a set of managerial principles that govern all marketing processes and activities of a firm at strategic and operational levels so that they conform to SDL tenets. It is a second-order construct comprising four dimensions: customer solution, customer interaction, customer co-creation and system-based orientation. The suggested scale consists of 15 reflective items in total.
Originality/value
This SDO scale is viewed from and assessed by a firm’s strategic managers which covers all internal and external marketing aspects of the firm’s operation. It is different from a customer perspective or cultural perspective as used in the scales existing in the literature.
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Nguyen-Hau Le, Hai-Minh Thi Nguyen and Tuan Van Nguyen
Based on the intra-national diversity view, this research aims to employ the concept of national identity to explain the consumer's evaluation of foreign product with local brand…
Abstract
Purpose
Based on the intra-national diversity view, this research aims to employ the concept of national identity to explain the consumer's evaluation of foreign product with local brand and the extent of consumer ethnocentrism. It then investigates how product evaluation and consumer ethnocentrism are capable of explaining consumer's perceived value of the product. Finally, it tests the impact of consumer perceived value on consumer willingness to buy.
Design/methodology/approach
A sample of 251 consumers of local wine in Vietnam was analysed using structural equation modelling technique.
Findings
National identity has positive impacts on product evaluation and consumer ethnocentrism. These two factors together can explain 58 percent variance of consumer's perceived value, which is the key predictor of willingness to buy. Additionally, emotional and social values are found to be important motivators of local wine consumption in Vietnam.
Research limitations/implications
The three reflective first-order components of national identity might be alternatively modelled as formative ones. Moderating effect of consumption occasions, consumer knowledge and other social demographics should be investigated. Finally, to compare Vietnamese consumers towards local wine vs foreign wine.
Originality/value
Among very few empirical studies about the effects of national identity on consumer's value of foreign product with local brand under a mixed effects of the perceived inferior quality of locally made product and status-oriented consumption behavior, via the full mediation of product evaluation and consumer ethnocentrism. This study also suggests a conceptual distinction between ethnocentrism and consumer ethnocentrism in studies of national identity.
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Dzung Dao Dong, Masahiro Moritaka, Ran Liu and Susumu Fukuda
Restructuring swine and pork value chain plays important role in agriculture reformation of Vietnam, the top global pork-lover and swine producer worldwide. This study aims at…
Abstract
Purpose
Restructuring swine and pork value chain plays important role in agriculture reformation of Vietnam, the top global pork-lover and swine producer worldwide. This study aims at investigating the modernization of its entire swine-to-pork value chain.
Design/methodology/approach
This study combines the secondary data and primary data. The secondary data included the publications, procurements, databases from both worldwide and in Vietnam. Primary data comprised the results from field-trips in March 2018 and February 2019 that used in-depth interviews with representative key persons of involving stake-holders.
Findings
The prevalence of contract farming, vertical expansion and conglomerate mergers mainly boost vertical coordination in the industry, which creates three hierarchy paradigms of governance named the full- and semi-vertically integrated model, and the formal coordinating relation institution. Consequently, consolidation has occurred and lead the swine and pork value chain toward modernization.
Research limitations/implications
This study generalizes its first trends of the modernization of the swine-to-pork industry instead of provides its concreted impacts to the involved stakeholders.
Social implications
Swine and pork industries retain historical and socio-political issues in Vietnam. Social problems are going to raise if number of traditional swine producers are failed in the competition from the equipped large-scale producers leading by the giant vertically-integrated contractors.
Originality/value
This study provides the empirical synthesis of the vertical coordination in entitle swine and pork value chain of Vietnam through combining the view of the strategic alliance of the firm and global value chain governance.
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Huu Minh Nguyen, Thi Hong Tran and Thi Thanh Loan Tran
“The world needs science, science needs women” is the message given by UNESCO in the program for the development of women in science” (UNESCO, 2017). In Vietnam, women’s…
Abstract
“The world needs science, science needs women” is the message given by UNESCO in the program for the development of women in science” (UNESCO, 2017). In Vietnam, women’s participation and achievements in scientific research is considered a great and important resource for industrialization and modernization. Even so, are there gender differences in scientific achievement in the social science research institutes in Vietnam? What factors influence the scientific achievement of female social researchers? The answers will be based on data from a 2017 survey with a sample of 756 researchers, of which 77.6% were female. The survey was conducted by the Vietnam Academy of Social Sciences, a leading, ministry-level national center for the social sciences in Vietnam. This chapter analyzed the scientific achievements of researchers through their position as principal investigators of research projects and their publications, and factors that may impact this. Bivariate and multivariate analyses of factors that may affect the scientific achievement of researchers found that gender differences in academic achievement in the social sciences in Vietnam was still prevalent. Female researchers’ scientific achievements were lower than those of their male counterparts. The contribution to science of Vietnamese female researchers was limited by many different factors; the most important were the academic rank of the researchers and gender stereotype that considered housework the responsibility of women.
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Thien Vuong Nguyen, Dai Lam Tran, Tuan Anh Nguyen, Thi Thanh Huong Nguyen, Phi Hung Dao, Van Phuc Mac, Minh Thanh Do, Thi Mai Nguyen and Thi My Linh Dang
This study aims to explore how the inhibitor-loaded nanocontainers can be used in the epoxy coating for protection of steel against corrosion. A self-healing anticorrosive coating…
Abstract
Purpose
This study aims to explore how the inhibitor-loaded nanocontainers can be used in the epoxy coating for protection of steel against corrosion. A self-healing anticorrosive coating can be easily fabricated by embedding the inhibitor-loaded nanocontainers into the epoxy coating matrices. For this purpose, first, cerium (a catholic corrosion inhibitor) is encapsulated into silica nanoparticles (SiO2@Ce). Thereafter, an epoxy nanocomposite coating has been prepared on steel substrate using these SiO2@Ce nanoparticles as nanofillers.
Design/methodology/approach
To examine the effect of SiO2@Ce nanocontainers on mechanical properties of epoxy coating, the abrasion resistance, impact resistance and adhesion strength of coating have been evaluated. To reveal the effect of SiO2@Ce nanocontainer on corrosion behavior of epoxy-coated steel, the electrochemical impedance spectroscopy (EIS) has been conducted in NaCl solution.
Findings
Transmission electron microscopy and scanning electron microscopy/Energy-dispersive X-ray spectroscopy analyses indicate that Ce3+ cations have been successfully loaded into the surface of silica nanoparticles (at the content of approximately 2 Wt.%). Mechanical tests of epoxy nanocomposite coatings indicate that the nanocomposite coatings with nanoparticles content of 2.5 Wt.% provide the highest values of abrasion resistance, impact resistance and adhesion strength. EIS results show that the presence of SiO2@Ce3+ nanocontainers increases both coating resistance and polarization resistance. Along with the improvement the coating barrier performance, Ce inhibitor plays an important role in improving the anticorrosive performance at the steel–electrolyte interface.
Originality/value
The application of self-healing epoxy/SiO2@Ce nanocomposite coatings for the protection of carbon steel is very promising.
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An H.K. Vo, Tuan-Duong Nguyen, Yen-Nhi Le, Huong Ngoc Quynh Cao, Van Ngoc Thanh Le and Khanh-Linh Huynh
Based on the model of Big-Five personality traits and theories of person–environment interaction, this study aims to investigate the moderating effects of personality traits on…
Abstract
Purpose
Based on the model of Big-Five personality traits and theories of person–environment interaction, this study aims to investigate the moderating effects of personality traits on innovativeness through knowledge sharing (KS).
Design/methodology/approach
A sample of 318 Vietnamese employees was collected. The hypothesized model was tested by using partial least squares structural equation modelling.
Findings
The results indicate that extraversion, agreeableness, conscientiousness and openness to experience have relationships with innovativeness through the mediating effect of KS. Furthermore, transformational leadership (TL) mitigates the positive relationship between agreeableness and openness to experience and innovativeness.
Practical implications
Based on the research results, the authors suggest several practical implications for enhancing employees' innovative organizational behaviours. Transformational leaders should be aware of and control the relationships with employees high in agreeableness and open to experience to ensure that employees' innovativeness can be freely developed.
Originality/value
This research systematically investigates the effect of each personality on employees' innovativeness. Furthermore, this study contributes to the leadership literature by suggesting the dark side of TL that can negatively influence the innovative ability of employees with certain personality traits.
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Dmitry Leonidovich Kovalenko, Vy Uong Van, Van Phuc Mac, Thien Vuong Nguyen, Lan Pham Thi, Tuan Anh Nguyen, Vladimir Evgenevich Gaishun, Vasili Vasilievich Vaskevich and Dai Lam Tran
This paper aims to explore how graphene can improve the mechanical and anti-corrosion properties of TiO2-SiO2 sol-gel coating. This sol-gel coating has been prepared on aluminum…
Abstract
Purpose
This paper aims to explore how graphene can improve the mechanical and anti-corrosion properties of TiO2-SiO2 sol-gel coating. This sol-gel coating has been prepared on aluminum alloy substrate using graphene as both nano-filler and corrosion inhibitor.
Design/methodology/approach
To examine the effect of graphene on mechanical properties of sol-gel coating, the abrasion resistance, adhesion strength and scratch resistance of coating have been evaluated. To reveal the effect of graphene on the anti-corrosion property of coating for aluminum alloy, the electrochemical impedance spectroscopy (EIS) has been conducted in 3.5 Wt.% NaCl medium.
Findings
Scanning electron microscopy images indicate that graphene nanoplatelets (GNPs) have been homogeneously dispersed into the sol-gel coating matrices (at the contents from 0.1 to 0.5 Wt.%). Mechanical tests of coatings indicate that the graphene content of 0.5 Wt.% provides highest values of adhesion strength (1.48 MPa), scratch resistance (850 N) and abrasion strength (812 L./mil.) for the sol-gel coating. The EIS data show that the higher content of GNPs improve both R1 (coating) and R2 (coating/Al interface) resistances. In addition to enhancing the coating barrier performance (graphene acts as nanofiller/nano-reinforcer for coating matrix), other mechanism can be at work to account for the role of the graphene inhibitor in improving the anticorrosive performance at the coating/Al interface.
Originality/value
Application of graphene-based sol-gel coating for protection of aluminum and its alloy is very promising.
Duong Tuan Nguyen, Thi Ngoc Hoai Nguyen, Van Binh Luu, Van Khanh Bui and Tra My Nguyen
This study aims to explore the impact of personality traits on self-perceived employability (SPE) and test if the associations are mediated by knowledge sharing (KS) through…
Abstract
Purpose
This study aims to explore the impact of personality traits on self-perceived employability (SPE) and test if the associations are mediated by knowledge sharing (KS) through online learning during the COVID-19 pandemic. In addition, the moderation effect of trust in the relationship between KS and SPE was examined.
Design/methodology/approach
Based on Big Five Personality Trait Model and KS model, the authors proposed and tested the research framework with 341 samples collected from university students who experienced online learning during the social distancing caused by the COVID-19 pandemic. The measurement model was assessed to confirm the validity and reliability of the structure, then hypothesis testing was performed with the partial least square-structural equational model (PLS-SEM).
Findings
The results showed that extraversion and agreeableness positively affected SPE through KS. Moreover, trust played a moderating role on the effect of KS on SPE.
Practical implications
Based on the research findings, the authors suggest that academic institutions, especially universities, should provide opportunities for students to explore their personality traits. Second, the university should organize specific activities that promote knowledge sharing among students. Third, the university should encourage the creation of platforms aimed at sharing knowledge in a reliable way that increases trust in responsiveness.
Originality/value
The present study contributes to the literature on SPE by presenting immediate empirical evidence on the relationship between personality traits and SPE, along with mediating and moderating effects. These findings provide meaningful implications for higher education institutions that implement online learning during challenging circumstances.
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Hiep-Hung Pham, Thanh-Thao Thi Phan, Oanh Pham, Trung Tien Nguyen, Van-An Le Nguyen, Minh-Trang Do and Anh Tuan Nguyen
This study aims to investigate the trend of research on universities and accountability (UAA) in Southeast Asian (SEA) countries.
Abstract
Purpose
This study aims to investigate the trend of research on universities and accountability (UAA) in Southeast Asian (SEA) countries.
Design/methodology/approach
A total of 115 journal articles, conference papers, books and book chapters were obtained from the Scopus database spanning the years 1996–2023. These documents were subsequently analyzed using bibliometric methods.
Findings
The majority of UAA in SEA documents were published between 2007 and 2023 (106 documents, 92.19%). Scholars from both SEA countries and outside the region, particularly Australia, co-authored UAA in SEA documents. While scholars from Vietnam contributed the highest number of UAA in SEA publications (30 documents), scholars from Australia received the highest number of citations (878 citations). Collaboration between Vietnam and Australia emerged as the most productive partnership in conducting studies on UAA in SEA. Additionally, UAA in SEA documents were published not only in education-related outlets but also in other sectors, particularly in public policy. Furthermore, studies on UAA in different countries exhibited both similar and dissimilar interest keywords.
Originality/value
This study represents the first bibliometric analysis focusing on UAA in SEA literature. The insights and implications derived from this study are valuable for future researchers, university leaders and policymakers.